AOI (Automated Optical Inspection)-based display panel defect classification method and device

Abstract

The invention discloses an AOI (Automated Optical Inspection)-based display panel defect classification method and device. The method comprises the following steps: 1) acquiring a display picture of a display panel, and extracting a defect feature attribute vector d of the display picture; and 2) providing a defect feature attribute descriptive set M, wherein the defect feature attribute descriptive set M comprises feature attribute description vectors m of multiple defect types; respectively performing convolution on the defect feature attribute vector d and the feature attribute description vector m of each defect type, and generating a group of convolution values, wherein the defect type corresponding to the maximum convolution value is the defect type of the defect feature attribute vector d. According to the method disclosed by the invention, the automation degree of defect recognition and grade determination of the display panel can be realized by automatically extracting the defect feature information of the display panel and automatically recognizing the quantities and types of the display defects, and the detection efficiency and accuracy of the defect recognition and grade determination of the display panel can be greatly improved.

Description

Technical field [0001] The present invention relates to the technical field of display panel inspection, in particular to an AOI-based display panel defect classification method and device. Background technique [0002] Flat-panel displays have the advantages of high resolution, high grayscale, and no geometric distortion. At the same time, due to their small size, light weight and low power consumption, they are widely used in consumer electronics products that people use daily, such as televisions, computers, Mobile phones, tablets, etc. The display panel is the main component of the flat display device, and its manufacturing process is complicated. And as the size of the display panel becomes larger, the uniformity of the gray scale becomes more and more difficult to control. Therefore, it is inevitable that various problems will occur during the manufacturing process. A variety of display defects, such as bright spots / dark spots / bright foreign objects / BL foreign objects (bac...

AI Technical Summary

Problems solved by technology

The display panel is the main part of the flat-panel display device. Its manufacturing process is complicated, and as the size of the display panel becomes larger, it becomes more and more difficult to control the uniformity of the gray scale. Therefore, it is inevitable that various A variety of display defects, such as bright spots / dark spots / foreign matter bright / BL foreign matter (backlight foreign matter) / white spots / bright dark lines / Mura and other display defects

[0003] At present, the display panel production line generally adopts the method of visually identifying the number and type of display defects to judge the level of the display panel, which has low detection efficiency and high false detection rate.

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